Oil burner



May 18 1926.

L. S. CHADWICK OIL BURNER 1922 4 Sheets-Sheet Filed Nov. 23

run,

May 18,1926. 1,585,019

- I... s. CHADWICK OIL BURNER Filed Nov. 23 1922 4 Sheets-Sheet 4W.WAM

May 18, 926. 1,585,019

1... s. CHADWICK' OIL BURNER .Filed Nov. 23 v 2 4 Sheets-.-Sheet. 5

Inn /a ar" May 18,1926. 1,585,019 L. S. CHADWICK OIL BURNER Filed Nov.23, 1922 4 sheetssheet 4 4 MMM Patented May 18, 1926.

ufrrs srrss lgid idllt LEE S. GHADWICK, GE SHAKER HEIGHTS, Q3518,ASSIGNOR, T0 PERFECTION STOVE COMPANY, OF CLEVELAND, OI'HO, ACQEl-OB-AIEEON OF OHIO.

OIL BURNER.

Application filed. November 23, 1922. Serial Ito. 662,?4-0.

Reference is. made to my former applica tion, Serial No. 528,813, forautomatic wick stops, filed January 12, 1922, which has matured intoPatent 1,471,5 9, issued October 23, 1923.

My present invention relates to the same subject, and has to do moreparticularly with improvements which I have evolved in reducing theinvention to. a more practical and commercial form.

While burners accurately constructed in accordance with my abovementioned application operate in a thoroughly satisfactory manner, it isfound that such extreme accuracy of parts as is required to make theformer construction operate properly at all times, is somewhat ditflcultor at least expensive of attainment and therefore not altogetherfeasible in the manufacture of the burner on an extensive productionbasis.

The fundamental object of my present invention, therefore, is toconstruct a burner possessing all of the characteristics, and advantagesof my earlier burner and which is better adapted to establishmanufacturing methods and conditions, to the ends that its productionmay be" cheapened and expedited and its satifactory operation and itseasy and convenient manipulation assured.

As will be seen by reference to the above mentioned application, and aswill appear hereinafter, the wick stop mechanism incorporated in myburner co-acts'with the wick adjusting or raising means to limit thelatters movement and thereby stop the wick at a predetermined elevation.The stop mechanism has connection with the air distributing member orflame spreader anc it is through a part of said member being engaged bythe burned end of the wick and the member and consequently the stopmechanism lifted by the wick, that the stop mechanism is coupled withthe wick adj us"- ing means, and after the wick adjusting means and stopmechanism are so coupled together, the former, through the interven tionof the latter, lifts the air distributing member or flame spreader fromthe wick immediately to a position wherein its functions purely an airdistributing member after which the adjusting means may be manipulatedto adjust the wick to any position within its burning range, the upwardmovement of the wick being arrested apt to be disturbed which wouldresult in obtaining an improper range of flame heights; and under someconditions as where there is an appreciable amount of lost motionbetween the wick adjusting means and the wick, the descent of the wickmight be so delayed as to permit the air distributing member or flamespreader to overtake and engage the wick on its downward movement, evento the extent of binding or locking the mechanism because of the factthat the air distributing member or flame spreader is positively moveddownwardly at a considerably higher rate of speed than the wick.Furthermore, the portion of the flame spreader which has becomeintensely heated during the operation of the burner, by engagingthe oilsoaked wick, produces a smoke or smudge of disagreeable odor, and isliable to create a very dangerous condition by the generation of gaseswhich may be ignited by a dilatory flame or by the hi hly heated partsof the burner orby incandescent carbon particles thereon.

A somewhat more limited object of my present invention, therefore, is tointroduce, somewhere in the connections between the wick raising oradjusting means and the air controlling member or flame spreader,suiiicient lost motion to offset the inherent lost motion between theadjusting means and the wick, thereby to retard the descent of saidmember at least equal to the maximum retardation of the wick, so thatregardless of the play in the connections between the wick raising oradjusting means and the wick, the wick may be adjusted to any positionwithin and below its buring range from its high position to a positionwherein the fire is extremely low, lower than was possible ofaccomplishment in my former construction, and further to a position sofar down within the wick tubes that the flame is extinguished and whichis below the maximum low position of the part of the air distributingmember or flame spreader wherewith the wick engages-before the airdistributing member or flame spreader starts to descend, thus obviatingany possible occurrence of the undesirable condition above set forth.

I preferably incorporate a lost motion connection between the wickraising spindle and the ratchet wheel which is mounted upon said spindleand through which the wick stop mechanism is coupled with the spindle;and itfollows as a further object to provide a simple, but very reliablelost motion connection between said parts which is economical ofproduction and convenient of assembly; and in order to insure againstthe ratchet wheel being rotated with the spindle, through its frictionalengagement therewith, before the play in the lost motion connection istaken up, I provide a brake for said wheel which imposes a drag thereonsuperior to the frictional engagement of the wheel with the spindle.

Among the other objects of the invention, which pertain moreparticularly to structural refinements, are the provisions of ananti-friction device for supporting the movable element through whichthe air distributing member or flame spreader is sustained at a definiteelevation, thereby rendering easier the operation of the burner than isthe case with my former construction where the said element is requiredto ride over a stationary bearing surface; and to equip the locking pinof the air distributing member or flame spreader with a sleeve of brassor like metal where it cooperates with steel guiding parts so as toprevent such a rusting of the parts as would interfere with their freerelative movement.

The foregoing object, and others which will appear as this descriptionproceeds, are attained in the construction illustrated in theaccompanying drawings wherein Fig. 1 represents a central verticalsection through a burner embodying my invention; Fig. 2 is a fragmentarysectional plan view on the line 2-2 of Fig. 1; Fig. 3 is a sectionalside elevation of the burner as though viewed from the left of Fig. 1;Fig. 4 is a view, similar to Fig. 3, showing the wick elevated and thewick stop mechanism in a corresponding position; Fig. 5 is anelevational detail of the lower portion of the burner, as though lookingfrom the right of Fig. 4; Fig. 6 is a sectional detail on thecorrespondingly numbered line of Fig. 4; Figs. 7 and 8 are fragmentaryvertical sections through the burner, Fig. 7 showing the wick fullyelevated and the wick stop mechanism in the position occupied when thewick is fully elevated, and Fig. 8 showing the wick lowered while thewick stop mechanism remains in the position illustrated in the precedingview, the views thus serving to indicate the extent of the relativemovement permitted between the wick raising means or spindle and thewick stop mechanism by virtue of the lost motion" con -tion bctween thetwo; Fig. 9 is a sccti ll detail of the lost motion connection, theplane of section being indicated by the line 9-9 of Fig. 7; Fig. 10 is asectional detail on the line 10-10 of Fig. 8; Fig. 11 is a fragmentaryperspective view of a bracket by means of which certain parts of thestop mechanism are supported and guided, and it includes theanti-friction bearing that supports the stop plate or movable elementthrough which the air distributing member or fiamc spreader is sustainedat a given elevation; and Fig. 12 is a perspective view of the stopplate.

The burner comprises inner and outer wick tubes 1 and 2, respectively,that are joined together at their lower ends by an annular wall 3,thereby to enclose a wick space 4: to which liquid fuel may be suppliedthrough a fitting 5. The inner wick tube, as is best illustrated in Fig.2, has a reenrrant portion 6 to provide an offset 7 of the wick space.The offset 7 is closed at its lower end by a wall 8, which may be anextension of the former wall 3, and at its upper end by a wall 9 fromwhich rises a sleeve 10 through which a rod 11 is guided, the lowerportion of the rod occupying the inner part of the offset 7. Secured tothe lower end of the rod is a wick support 12 which, in the presentinstance, is shown as of the same design and construction as thatdisclosed in the copending application of myself and Marc Resek, SerialNo. 596,970 filed October 26, 1922. The elevator is of segn'ientalshape, as shown in Fig. 2, and extends substantially halfway around thewick space and at its middle has an arm through which the beforementioned connection is made with the rod 11. A cylindrical wick 15,equipped with the usual carrier 16, occupies the wick space and restsupon slightly elevated seats or bearing portions 17 at the ends of thewick support (see Fig. The wick is adapted to be separably connected tothe support through grips 18 which extends upwardly from the ends of theelevator and have inturned lips or flanges 15) at their unperends whichengage over the corresponding edge of the wick carrier 16. Thisconstruction is fully disclosed in the above mentioned application.Serial No. 596,970.

As will also more clearly appear from the application just referred to.the upper end of the rod 11 has connection with a rack member 20 whichis of channel formation and embraces the reentrant portion 6 of theinner wick tube, as shown in Figs. 1 and 2. One of the side flanges ofthe member "20 is provided with a series of transverse slots 21 that areequally spaced apart and extend upwardly a suitable distance from thelower end of the member thereby to efi'ect a rack wherewith a pinion 22'meshes (Fig. 9') that is secured to a spindle 23, journaled withinopposed branches 25 and 26 of a bracket 27 that is secured to anddepends from the burner, the horizontal portion of the bracket having anopening through which the rack member 20 operates. The outer end of thespindle 23 is equipped with a suitable operating handle or hand wheel 28by means of which the spindle may be rotated.

It is clear from the above that when the spindle is rotated it willcause the rack to be moved vertically to similarly adjust the wick byreason of its connection therewith through the rod 11, wick elevator 12and grips 18-.

Supported for vertical movement within the upper end of the inner wicktube is an annulus or spanner 3-0 from which a frame 31 depends, theframe being guided at its lower end by the rear branch 26 of the bracket27 shown in perspective in Figure 11. In order to properly guide theframe. the lower end of said branch is provided with an overturned lug33 which embraces one edge of the frame, and with a laterally and thenrearwardly turned portion 3a which is engaged about the opposite edge ofthe frame. The portion 34 is spaced fur- V ther from the body portion ofthe branch 26 than is the lug 33 for a purpose which shall presentlyappear, and the portion 34 has joined to it, through an integral neck35, a head 36'. Jo-nrnaled upon a suitable bearing member 37 that iscarried by the head 36 is an anti-friction roller 38. In the presentinstance the bearing member 37 is shown as a shouldered rivet, and theroller is preferably recessed to receive the head 39 thereof (see Figure6.) Being so formed,

the roller has a. comparatively wide peripheral bearing face, is reduced"in width where it bears upon the body of the rivet so as to lessen thetendency to bind by an uneven" distribution of pressure thereon axiallyof the rivet, and the space between the rivet head and the adjacentsurface of the roller is protected by the overhang of the roller againstan accumulation of dust or char and gummy oil deposits which might belikely to settle thereon as they drop through the burner.

Pivotally connected at 40 to the frame 31 is a stop plate 41incorporating a bendable and therefore adjustable stop 42 which isarranged to engage one edge of the frame 31 to limit the angularmovement of the stop plate with respect to the frame in one direction.This step plate corresponds to what I termed the pawl carrying member inmy application Serial No. 528,813,- first above referred to, It was sotermed by reason of the fact that it carries a pawl. The pawl in thepresent instance is designated 4:3 and it is preferably formed integralwith the plate, and has an inwardly directed upper end for engagementwith the teeth of the ratchet wheel 45 that is carried by the spindle23. In my earlier construction, shown in the application just referredto, the ratchet wheel secured rigidly to the wick adjusting spindle. Inmy present construction, the wheel is dished and has a sleeved hub 46which is rotatably supported upon the neck 4? of a circular head =28that is fixed to the end of the s indle 23, the head l8 lying within thedis ed portion of the wheel.- As will be seen more clearly from Figure9, the spindle 23 is reduced in diameter for a suitable distance fromits inner end and the reduced portion is flattcned along one side. Thepinion 22 is first applied to the reduced end of the spindle and engagesthe shoulder produced by the adjacent enlargement, the aperture of thepinion being of a shape corresponding" to the cross-sectional shape ofthe flattened reduced portion of the spindle so that it is held againstrotation "with respect thereto. A spacer 50 is interposcdbetween thepinion 22 and the neck i? of the head 48 and the same is somewhatgreater in diameter than the neck so as to confine between it and thehead l8 the hub 48 of the ratchet wheel. The head 48 has a peripheralnotch 51 into which projects a lug 52 of the wheel, the lug being ofconsiderably less lateral extent than the notch. This, therefore,provides the lost motion connection between the spindle and the ratchetwheel hereinbefore referred to, and through it, the wheel and spindlehave considerable independent movement.

To insure the spindles having movement independently of that of theratchet wheel under certain conditions, and to avoid the frictionbetween the hub of. the ratchet wheel and the neck of the head 48 frominterfering with such independent movement,

I provide a brake for the ratchet wheel in the nature of a resilientU-shaped member 55, which is secured to the inner wick tube adjacent theratchet wheel and embraces the edge of the latter so as to impose a dragthereon. The purpose of the brake will be better understood from thedescription of the operation of the burner which is to follow. I

lVhile the head 428 may be secured in any suitable manner to thespindle, my present preferred method of accomplishing this is bydepositing solder within the joint between the head and the spindle; andin order to accommodate sniiicient solder to make this connectionthoroughly eifective,v I make the aperture in the neck; of the headcylindrical for a suitable distance inwardly from its rear end andthroughout the remainder of its length of a shape corre sponding to thatof the reduced flattened portion of the spindle. This leaves a pocketfor a liberal supply of solder which is indicated at While it isadvantageous to have the pawl 43 capable of a limited swii'igingmovement, it must be restraii'ied against undue angular movement andthis I accompl sh by providing a member (i that -cured at 61 to the stopplate and has a notch 63 which is little wider than the pawl is thickand which embraces the pawl.

Reposing within the upper end of the burner is the air distributingmember or flame spreader 65 which rests, through its body portion 66,upon the spanner 30, The member is adapted to be latched to the spannerby the engagement of the keeper portions 67 of tumblers 68 with anannular shoulder 69 of said member. The tumblers are pivoted at 70 tothe frame 31 and they are confined to a limited angular movement by lugs71 of the frame which project through holes 7 2 in the tumblers.

The tumblers are adapted to be forced apart with their keeper portionsin holding engagement with the shoulder 69 by a pin 7 5 that is slidablycarried by the air distributing member or flame spreader and constitutesa lifting means therefor by extending upwardly through the top of saidmember where it is provided with a convenient grip 76. The neck 77 ofthe pin is guided through aligning apertures formed in the top wall ofthe member, and in a fitting 78 that depends from said wall. The flamespreader parts are preferably constructed of steel, suitably treated soas to make it as nearly rust proof as practicable, but by reason' of thesliding of the neck of the pin through the guiding parts they are apt tobecome worn and therefore liable to rust. To prevent an accumulation ofrust such as would interfere with the operation of the parts, I preferto encase the neck of the pin in a relatively thin sleeve 79 of brass orother material immune from rust. Thus, by the use of a comparativelythin sleeve, I economically attain as good results as if the entire pinwere made of brass or the like. The air distributing member or flamespreader is provided with the usual flange 80 and top 81 which projectout over the annular wick space; the flange being directed downwardly atits edge so as to project into the wick space when the flame spreader isin its lowest position, Several forms of latch mechanisms, including theone herein illustrated (excepting the sleeve 79), for locking the airdistributing member or flame spreader to the spanner, are disclosed inan application of myself and Marc Resek, Serial No. 528,833, filedJanuary 12, 1922,

In describing the operation of the burner we shall assume that, instarting, the parts are in the position shown in Figs. 1 and 3, Toelevate the wick to burning position the spindle 23 is turned in thedirection indicated by the arrows in Fig. 1. This will result, throughthe following connections: pinion 22, rack member 20, rod 11 and wicksupport 12, in elevating the wick, the wick engaging the flange S0 ofthe flame spreader, lifts the flame spreader and with it the frame 31and stop plate 11. The stop plate, being guided as hereinbeforeexplained, is confined for a period to a vertical course of movementwhich brings the nose of the pawl 43 into the range of the teeth of theratchet wheel The wheel then, through one of its teeth. picks up thepawl and, through the pawl, lifts the stop plate 4:1, the frame 31, thespanner 30, and the flame spreader which is supported thereon. Theupward movement of the pans continues until the arcuate lower edge ofthe stop plate rides over and is supported by the roller 38. Thisroller, therefore, determines the elevation of the flame spreader andpositions the flange SO in proper relation to the upper ends of the wicktubes, It may be explained at this point that this position of the flamespreader may le adjusted to a nicety by raising or lowering the roller38 through the bending of the neck 35 which connects the rollersupporting head 3 to the part 34- of the bracket branch 26.

The an ular movement of the stop plate 11, after its lower edge escapesover the roller 38, determines the extent to which the spindle 23 may berotated to further elevate the wick after the flame spreader has come torest. This is because the spindle is locked to the stop plate throughthe pawl 43 and the stop plate is brought to rest by the engagement ofthe stop thereof with the adjacentedge of the frame 31, \Vhen the partsare in this condition. as indicated in Figs. 4: and 7, the wick is inhigh position. Now, by reason of the lost motion connection hereinbeforedescribed between the spindle and the ratchet wheel, the wick may belowered to any point within its burning range without affecting theposition of the ratchet wheel which. it will be remembered, is retainedagainst accidental movement, by the brake It is not until the wick iswell down that the spindle picks up the ratchet wheel and starts torotate it in a direction which, when the lower arcuate edge of the stopplate -11 rides oil the ioller 38, will result in the lowering of theflame spreader.

Having thus described my invention, what I claim is:

1. In an oil burner of the character set forth, the combination with thewick, of adjusting means for raising and lowering the wick, stopmechanism adapted to be coupled with the wick adjusting means and havinga limited scope of movement thereby to restrain said means againstraising the wick above a predetermined position, a member connected tothe-stop mechanismand arranged in the path of the wick so that the wickengages and lifts said member and, through it, couples the stopmechanism with the wick adjust ing means, said mechanism thereafterserving to lift, through the action of the adjusting means, the memberfrom the wick and sustain the same at a given elevation, and a lostmotion connection between the means and mechanism whereby the means ispermitted to operate for an interval independently of the mechanismthereby to lower the wick an appreciable distance before the mechanismis actuated in a direction to lower the aforesaid member.

2. In an oil burner of the character set forth the combination with thewick, of adjusting means for raising and lowering the wick, stopmechanism adapted to be coupled with the wick adjusting means and havinga limited. scope of movement thereby to restrain said means againstrais-' ing the wick above a predetermined position, a member connectedto the stop mechanism 7 and arranged in the path of the wick so that thewick engages and lifts said member and, through it, couples the stopmechanism with the wick adjusting means, said mechanism thereafterserving to lift, through the action of the adjusting means, the memberfrom the wick and sustain the same at a given elevation, a lost motionconnection between the means and mechanism whereby the means ispermitted to operate for an in- ,erval independently of the mechanismthere by to lower the wick an appreciable distance before the mechanismis actuated in a di-s rection to lower the aforesaid member, and meansrestraining the stop mechanism against movement during said interval oftime.

3. In an oil burner of the character'set forth, the combination with thewick, of adjusting means for raising and lowering the wick, a memberarranged in the path of the wick and adapted to be engaged and lifted bythe wick when the latter is elevated,

.mechanism coupled with the wick adjusting ber which permits said meansto operate independently of the mechanism which connects said means withsaid member.

4:. In an oil burner of the character set forth, in combination with thewick, stop mechanism limiting the upward movement of the wick, means forrendering the stop mechanism operative, said means incorporating amember that is adapted to be engaged and moved by the burned portion ofthe wick and arranged to automatically with draw therefrom when the wickis in burning position, and means preventing the descent of said memberwhile the wick occupies a position within its burning range.

5. In a burner of the character set forth, the combination of wickadjusting means, a member arranged to be engaged and lifted by the wick,and connections between said member and the wick adjusting meansinvolving a stop for said means and a lifting means for the member, saidconnections including a lost motion device insuring depression of thewick beyond reach of the member when the wick and member are lowered bythe wick adjusting means.

6. In a burner of the character set forth, the combination with thewick, of adjusting means for raising and lowering the wick, a ratchetwheel having a lost motion connection with and adapted to be rotated bythe wick adjusting means, a member arranged to be engaged and moved bythe wick, a pawl carrying element connected to said member, a pawl onsaid element adapted to be engaged with a tooth of the ratchet wheelwhen said element is elevated by the aforesaid member, the connectionsthus established between the ratchet wheel and said member causing saidmember to be withdrawn from the wick through the action of the wickadjusting means, and means limiting the rotation of the ratchet wheelthereby to arrest movement of the wick adjusting means.

7. In a burner of the character set forth, the combination with thewick, of adjusting means for raising and lowering the wick,

ratchet wheel having a lost motion connection with and adapted to berotated by the wick adjusting means, a member arranged to be engaged andmoved by the wick, a pawl carrying element connected to said member, apawl on said element adapted to be en gaged with a tooth of the ratchetwheel when said element is elevated by the aforesaid member, theconnections, thus established between the ratchet wheel and said membercausing said member to be withdrawn from the wick through the action ofthe wick adjusting means, means limiting the rotation of the ratchetwheel thereby to arrest movement of the wick adjusting means, and meansfor retarding the rotation of the ratchet wheel.

S. In a burner of the character set forth, the combination with thewick, of rotative wick adjusting means, a ratchet wheel having a lostmotion connection with said means, a member arranged to be engaged andmoved by the wick, a frame movable with said member, a pawl carryingelement pivotally connected to the frame so as to be capable of both avertical movement with the frame and a rotative movement with theratchet wheel, means restricting the initial movement of said element toa vertical course which is effective until said element has been raisedto a position wherein its pivotal connection with the frame issubstantially coincident with the rotating axis of the ratchet wheel, apawl carried by said element which is engaged with a tooth of theratchet wheel during the initial vertical movement of said element, theelement rotating with the ratchet wheel after its pivotal axis hasassumed substantial alignment with the rotating axis of the ratchetwheel, and a stop for limiting the rotative movement of the element.

9. In an oil burner, in combination with the wick, means for raising andlowering the wick, a flame spreader, and means acting automatically toelevate the flame spreader when the wick is at a given point in itsupward travel and to lower the flame spreader when the wick is at adifferent point in its downward travel.

, 10. In an oil burner, in combination with the wick, means for raisingand lowering the wick, a flame spreader, and means operated by the wickraising and lowering means for elevating the flame spreader when thewick is at a given point in its upward travel and for lowering the flamespreader when the wick is at a different point in its downward travel.

11. In an oil burner, in combination with the wick, means for raisingand lowering the wick, a flame spreader, mechanism through theintervention of which the wick raising and lowering means elevates theflame spreader when the wick is at a given point in its upward traveland lowers the flame spreader when the wick is at a different point inits downward travel, and a stop actuated by said mechanism forrestraining the wick raising and lowering means against raising the wickabove a predetermined point.

12. In a burner of the character set forth, in combination, a supportingstructure, wick adjusting means, an air controlling member, meanssupporting the air controlling member, an element connected to thesupporting means for limited movement with respect thereto and beingadapted to assume driving connection with the wick adjusting meansthereby to limit the movement of the latter, an anti-friction bearingover and in contact with which said element is arranged to ride whenconnected with and moved by the wick adjusting means, the elementserving the while to sustain the aforesaid supporting means in aposition to properly space the air controlling member from the wick.

13. In a burner of the character set forth, in combination with thewick, a rotatable spindle, wick adjusting means operated thereby forraising and lowering the wick, an air controlling member, a movablesupport therefor, an element pivoted to the support, said element beingcapable of limited angular movement and adapted to be connected to thespindle to be oscillated thereby and to limit the spindles rotation, andan anti-friction bearing whereon said element rides during its movementby the spindle thereby to sustain the support at an elevation toproperly space the air controlling member from the wick.

14-. In a burner of the character set forth, in combination with thebody structure of the burner, rotatable spindle journaled therein, wickadjusting means operated by the spindle for raising and lowering thewick, an air controlling member, a support therefor that is movablysustained by the body structure, an element pivoted to the support, saidelement being capable of limited angular movement and adapted to beconnected to the spindle to be oscillated thereby and to limit thespindles rotation, a head adjustably supported by the body structure,and an anti-friction bearing rotatably supported by the head and whereonthe element rides during its movement so as to sustain the support at anelevation to properly space the air controlling member from the wick,the spacing of said member from the wick being made variable through theadjustment of the aforesaid head.

15. In a burner of the character set forth, in combination with the bodystructure of the burner, wick adjusting means, an air controlling memberand its support movably sustained by the body structure, an elementmovable on the support and through which the wick adjusting means isadapted to have connection with said support to lift the sup port andmove the element with respect thereto, and an anti-friction bearingcarried by the structure for guiding the body support and sustaining theelement during the latters movement.

16. In a burner of the character set forth, in combination, a supportingstructure, wick adjusting means, an air controlling member, meanssupporting the air controlling member, an element connected to thesupporting means for limited movement with respect thereto and beingadapted to assume driving connection with the wick adjusting meansthereby to limitthe movement of the latter,

a bearing member carried by the structure, and a roller journaled onsaid bearing member, the bearing member having a head, the roller beingrecessed to receive the head, the aforesaid element being arrangeed toride upon said roller during its movement thereby to sustain thesupporting means in position to properly space the air controllingmember from the wick.

17. In a burner of the character set forth, in combination with thewick, adjusting means for raising and lowering the wick including arotatable spindle, a head secured to the spindle, a ratchet wheelrotatable on the axis of the spindle, said wheel and said head havingone a tongue and the other a recess for the reception of the tongue andwhich of greater circumferential extent than the tongue whereby a lostmotion driving connection is effected between the wheel and the head, amember arranged to be engaged and moved by the wick, a pawl carryingelement connected to said member, a pawl on said element adapted to beengaged with a tooth of the ratchet wheel when said element is elevatedby the aforesaid member, the connections thus established between theratchet wheel and said member causing said member to be withdrawn from,the wick through the action of the wick adjusting means, and meanslimiting the rotation of the ratchet wheel thereby to arrest movement ofthe wick adjusting means.

18. In a burner of the character set forth, in combination with thewick, adjusting means for raising and lowering the wick including arotatable spindle, a head having a neck secured to the spindle, aratchet wheel journaled upon the neck of said head, the wheel having alug and said head having a peripheral notch which is of greatercircumferential extent than the lug whereby a i lost motion drivingconnection is effected between the wheel and the head, a member arrangedto be engaged and moved" by the wick, a pawl carrying element, a pawl onsaid element adapted to be engaged with a tooth of the ratchet wheelwhen said element is elevated by the aforesaid member, the connectionsthus established between the ratchet wheel and said member causing saidmember to be withdrawn from the wick through the action of the wickadjusting means, and means limiting the rotation of the ratchet wheelthereby to arrest movement of the wick adjusting means 19. In a burnerof the character set forth, in combination with the wick, adjustingmeans for raising and lowering the wick including a rotatable spindle, ahead secured to the spindle, a ratchet wheel rotatable on the axis ofthe spindle, said wheel and said head having one a tongue and the othera recess for the reception of the tongue and which is of greatercircumferential extent than the tongue whereby a lost motion drivingconnection is effected between the spindle and the ratchet wheel, amember arranged to be engaged and moved by the wick, a pawl carryingelement connected to said member, a pawl on said element adapt-. ed tobe engaged with a tooth of the ratchet wheel when said element iselevated by the aforesaid member, the connections thus es tablishedbetween the ratchet wheel and said member causing said member to bewithdrawn from the wick through the action of the wick adjusting means,means limiting the rotation of the ratchet wheel thereby to an restmovement of the wick adjusting means, and a brake member frictionalyengaging the ratchet wheel to retard the latters movement.

In testimony whereof, I hereunto aiiix my signature.

LEE S. CHADWICK.

